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Power distribution network operation risk assessment method based on scene analysis

A technology of operation risk and distribution network, applied in the field of power system, which can solve problems such as fixation

Active Publication Date: 2019-12-20
NANJING UNIV OF SCI & TECH
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Problems solved by technology

This method can only reflect the risk situation of the distribution network at a certain static moment, but in the actual situation, the risk of the distribution network is not fixed, but changes with the change of wind power output and load fluctuations. Therefore, it is necessary to study the generation method of wind power output and load time series samples, and on this basis, accurately evaluate the time series risk of distribution network

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  • Power distribution network operation risk assessment method based on scene analysis
  • Power distribution network operation risk assessment method based on scene analysis
  • Power distribution network operation risk assessment method based on scene analysis

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Embodiment Construction

[0011] The solutions of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0012] Such as figure 1 As shown, the risk assessment method for distribution network operation based on scenario analysis includes the following steps:

[0013] Step 1: Sampling wind power, photovoltaic output and load to obtain a time series scene library.

[0014] The distribution network operation risk assessment method based on scenario analysis proposed by the present invention firstly considers the uncertainty of wind power and photovoltaic output and the fluctuation of load, samples wind power, photovoltaic output and load, and obtains a time series scene library. The specific method is as follows: :

[0015] Using Latin hypercube sampling to obtain wind power, photovoltaic output and load samples to form a time series scene library X:

[0016] X=[x 1 x 2 … x t … x T ]

[0017] where x t Represents the colle...

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Abstract

The invention provides a power distribution network operation risk assessment method based on scene analysis, and the method comprises the steps: sampling wind power, photovoltaic output and load, andobtaining a time sequence scene library; performing probabilistic load flow calculation under each moment scene to obtain probability distribution of voltage and load flow; evaluating a node voltageout-of-limit risk and a line power flow out-of-limit risk; and performing statistics on risk conditions at each moment to obtain time sequence risk distribution. According to the method, the uncertainty of wind power and photovoltaic output and the fluctuation of the load are considered, the time sequence risk of operation of the power distribution network is accurately evaluated, the result can better reflect the actual situation, and a basis can be provided for risk prevention and control of the power distribution network containing wind-solar energy.

Description

technical field [0001] The power system technology of the present invention specifically relates to a method for evaluating the risk of distribution network operation based on scenario analysis. Background technique [0002] In recent years, the problems of environmental pollution and energy shortage have become increasingly severe, and renewable energy represented by wind power and photovoltaics has been widely used. However, with the large-scale grid-connection of wind and wind energy, the topological structure and power flow distribution of the distribution network have become more complex, and the output of wind and wind has obvious intermittent and fluctuations, which has brought great challenges to the operation of the distribution network. uncertainty. Studying the operation risk of distribution network with large-scale wind and solar power access can provide a basis for risk control, avoid wind and solar abandonment, load shedding and other situations, and ensure th...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/06G06Q50/06
CPCG06Q10/0635G06Q50/06Y04S10/50
Inventor 阮思洁张俊芳杨振宁朱肖镕李娜徐洲
Owner NANJING UNIV OF SCI & TECH
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